Social Corner is great to use for a bulletin or message board, social posts, idea directory, shout outs, recognitions, announcements and new employee welcomes.
To use this web part, add it from the web part list to any of your SharePoint page sections:
Configuring web part
When you add the web part to the page for the first time, it will create a new folder inside SitePages library on a current site called SocialPosts. The web part will store all of your new posts in this folder.
If you need different social feeds running simultaneously (for example, welcomes and recognition posts), you can add two Social Corner web parts and point them to store posts in different folders.
To do that, access the web part properties and set the folder as needed:
The folder will be created automatically in your Site Pages library.
Alerts and notifications
Social Corner will notify users if someone commented on their post or if someone replied to their comment.
You can also set up additional notification and alerts just like you would for any other SharePoint page.
Here are steps from Microsoft on how to Create an alert to get notified when a file or folder changes in SharePoint.
Advanced: Managing permissions and archival
Since all posts are stored as pages in SitePages library in a designated folder, you can set content archival policies and other options available for SharePoint pages